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Suppose, we have four boxes A, B, C and D containing coloured marbles as given below : One of the boxes has been selected at random and a single marble is drawn from it. If the marble is red, what is the probability that it was drawn from box A? box B? and box C?

  Red White Black
A 1 6 3
B 6 2 2
C 8 1 1
D 0 6 4


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